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    Justin Spahr-Summers

    #84 AI Agents
    17CiteRank

    Last updated 13 Nov 2026 · Named in 7 answers across 3 engines
    Bing AI Mode starts a separate baseline. Copilot remains a separate public engine and keeps its history; changes across the switch are not like-for-like growth.

    How AI engines see them

    Recognized by 3 of 3 measured engines. Updated 2026-11-07

    All three engines recognize Justin Spahr-Summers as a co-creator of the Model Context Protocol at Anthropic. They agree he previously worked at Meta and GitHub and contributed to open-source projects. Gemini adds that he is a lead maintainer emeritus of MCP and has researched multi-agent systems. ChatGPT adds specific projects such as ReactiveCocoa, Carthage, Mantle, and Squirrel. Google AI Mode adds that MCP acts like a USB-C port for AI applications. No engine fails to name him. The cited pages most often come from anthropic.com and github.com, with lazyweb.com and dust.tt also appearing twice in Gemini's citations.

    • ChatGPTNamed in 2 answers

      Justin Spahr-Summers is a software engineer and open-source developer who co-created the Model Context Protocol at Anthropic and previously worked at Meta and GitHub.

      Known for
      • Co-creator of Model Context Protocol
      • Created ReactiveCocoa and Carthage
      • Worked on developer tools and infrastructure
    • GeminiNamed in 2 answers

      Justin Spahr-Summers is a co-inventor and lead maintainer emeritus of the Model Context Protocol, created at Anthropic, and has contributed to multi-agent systems research.

      Known for
      • Co-inventor of Model Context Protocol
      • Standardizing agent integration
      • Research in multi-agent systems
    • Google AI ModeNamed in 3 answers

      Justin Spahr-Summers is a co-creator of the Model Context Protocol at Anthropic who previously worked at Meta and GitHub and contributed to iOS and macOS open source.

      Known for
      • Co-creator of Model Context Protocol
      • Designing and launching MCP
      • Open-source contributions including ReactiveCocoa and Cartha
    • PerplexityNot named

      No description yet.

    • Bing AI ModeNot named

      No description yet.

    • CopilotNot named

      No description yet.

    Top Segments

    • #84AI Agentsof 108
      Named in 7 answers

    Top URLs

    1. 1
      What Are AI Agent Protocols? | IBM
      ibm.com4 citations
    2. 2
      https://den.dev/blog/mcp/
      den.dev3 citations
    3. 3
      Developer’s Guide to AI Agent Protocols
      developers.googleblog.com3 citations

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